Support for hand-drills.



PATENTED AUG. 9, 1904.

Noi 766,976.

F. P. SHEK.

,SUPPURT FOR HAND DRILLS.

APPLICATION FILED MAR. Z4, 1904.

2 SHEETS-SHEET l.

N0 MDBL.

' No. 766,976. PATENTED AUG. 9, 1904.

I'. P. SHEK.

SUPPORT FOR HAND DRILLS.

APPLIUATION FILED MAR. 24. 1904.

No MODEL. 2 SHEETS-SHEET 2.

wvi/imwo @Mmc/whoa,

Patented August 9, 1904.

PATENT OEEICE.

FRANK P. SHEK, OF NEW YORK, N. Y.

SUPPORT FOR HAND-DRILLS.

SPECIFICATION forming part of Letters Patent No. 766,976, dated August9, 1904i.`

f Application filed March 24, 1904. SerialNo. 199,850. (No modul.)

To vll 1,071,011?, it may concern:

Be it known that I, FRANK P. SHEK, a citizen of the United States,residing in New York, borough of Brooklyn, in the State of New York,have invented certain new and useful improvements in Supports forHand-Drills, of which the following is a speciiication.

This invention relates to an improved support for hand-drills by which,an ordinary breast-drill can be mounted on a support and usedindifferent relative positions to the work to beperformed, so that'theeliiciency and usefulness of the hand-drill is considerably enhanced andthe same can be applied with great advantage to a variety of differentapplications and more especially for outside work; and the inventionconsists of a support for hand-drills which comprises a tubular pillarprovided with a clamping-jaw at its lower end, an interior pillar alsoprovided with a jaw and capable of adjustment in the main pillar, anexterior sleeve on the main pillar, horizontal supporting-rods guided insleeves on said main sleeve and clamped to the same, and means forclamping said supporting-rods to said sleeve, one of saidsupporting-rods being attached to the drill-stock, while the othersupport is provided with means for clasping the upper threaded portionof the drill-stock for permitting the removal of the drill, with thesupporting-rod attached to the same, for use as an ordinarybreast-drill.

The invention consists, further, of certain additional details ofconstruction by which the drill can be adjusted higher or lower on thetubular main pillar or farther away or closer to the same or in radialdirection to the main pillar, as will be fully described hereinafter andfinally pointed out in the claims.

In the accompanying drawings, Figure l represents a side elevation of myimproved support for hand-drills. Fig. 2 is a side elevation, partly insection, thro ugh the main pillar and the interior extensible pillar.Fig. 3 is a side elevation in the direction of the arrow 3 shown in Fig.l, the support in these three figures being shown clamped to the work inwhich holes have to be drilled. Figs. 4 and 5-are side elevations of thesupport and the drill, showing the latter detached `from the support.Fig. 6 is a horizontal section on line 6 6, Fig. l; and Figs. 7 and 8are details of the clasp at the end of one of thehorizoutal rods of thesupport, said clasp being opened so as to permit the drill to be readilyremoved from the supporting-rods.

Similar letters of reference indicate corresponding parts.

Referring to the drawings, A represents a hand-drill of that class whichcan also housed as a breast-drill, and A my improved support for thesame. The support A is formed of three main pieces-a tubular-main pillarB, an exterior sleeve B, guided on the main pilllar, said sleeve beingof shorter length than said main pillar, and an interior extensiontubeB2, which is capable of adjustment in the main pillar. The lower end ofthe main pillar is provided with a U-shaped jaw that is secured theretoby a lock-screw c, which passes through the pillar and enters at itsinner end longitudinal groove c' ofthe tube B2, so that the latter isthereby guided and its rotation on the pillar prevented. At the upperend of the main pillar is a fixed interior collar (Z. The interiorextension-tube BL is provided at its lower end with a U-shapedclamping-jaw that is secured by a connecting-shank and rivet to thelower end of the extension-tube, while the upper end of said tube isprovided with an interiorly-threaded stationary socket c, through whichextends a screw-spindle E, that is provided with a handle E' at itsupper end and a shoulder c', that abuts against the collar d at theupper end of the main pillar B, so that on turning the handle of thescrew-spindle E in one or the opposite direction it will move theextensiontube B2 outwardly or inwardly into the main pillar and adjustthereby the relative position of the clamping-jaw at the lower end ofthe extension-tube to the clamping-jaw of the main pillar, according tothe sizeof the work to which the drill-support is to be attached. Ahelical spring c2, arranged in the pillar between the collar Z andsocket c, assists to move the extension-tube outwardly.

The exterior sleeve B is clamped to the main pillar B by thumb-screwsj', applied to IOO shoulders a a', respectively, at its ends. It isprovided at diametrically opposite points with two longitudinal ribs orsplines L2 for guiding a sliding collar of a horizontal socketsleeve b3,which is arranged at right angles with and sidewise of the collar andpreferablymade integral with the same, as shown in Figs. l, 3, and 6. Asimilar socket-sleeve is carried by the upper shoulder a.

In the socket-sleeves that are arranged at right angles to the collarand shoulder on the main sleeve are supported drill-supporting rods g g,of `which the lower-rod g is bent at right angles at its end into a flatangular piece g2, which is riveted to the drill-stock so as to bepermanently connected therewith. The rods g and g are secured inposition in their sockets by thumb-screws fofthelatter. The uppersupporting-rod g is provided at its end vertically above the angular endg2 of the lower supporting-rod g with a clasp, which consists of astationary piece g3 and a hinged piece g4, the latter being providedwith a spring-actuated catch that engages a socket on one of the jaws ofthe stationary piece g3, said spring-catch projecting above the hingedpiece so as to be readily withdrawn from the same by taking hold of theprojecting portion of the catch by the finger, pushing it back againstthe tension of its spring, releasing the catch from the stationaryportion g3, and then throwing the hinge portion gi into open position,as shown in dotted lines in Fig. 7, so as to permit the removal of thethreaded upper portion /L of the drill-stock from the clasp. The inneredge of the stationary piece g3 and hinged piece g4 of the clasp aretapped so as to correspond to the exterior screw-thread of the upperpart L of the drill-stock and permit the turning of the latter in upwardand downward direction in the same, the interior tap or screw-threads ofthe clasp acting in the nature of a nut on the threaded shank /z of thedrill-stock.

By adjusting the-jaws of the main pillar B and extension-tubeB2'relatively to each other the support can be clamped to any piece ofwork whatever be its size 'Within certain limits. When the clamping-jawsare adjusted to the work, the bit of the drill is placed in positionover the hole to be bored, the adjustment of the drill beingaccomplished by ad-4 justing the exterior sleeve B/ on the main pillarand moving the supporting-rods g g in their supporting-sockets forwardor backward until the desired position of the drill-bit is obtained. Thedrill is then operated by its crank in the usual manner, so as to borethe hole. rIhe drill can be adjusted higher or lower in any relativeposition to the upright pillar by means of the exterior sleeve andsupporting-rods, the depth of the hole to be drilled being controlled bythe forward motion of the threaded shank of the drill moving in thetapped opening formed by the clasp.

As the support can be clamped to the work in which the holes are to bedrilled, it is specially adapted for outdoor wo1k;but it can also beused with equal facility for boring holes indoors by clamping thesupport to the bench or other support.

In case it is desired to use the drill as a breast-drill Without theAsupport the clasp is opened in the manner described, so as to permit theupper portion or shank /L of the drill to be removed, together with theclasp, while the thumb-screw of the lower supporting-rod is loosened andthe latter withdrawn from its socket, the supporting-rod being used as ahandle for the drill, while the knob at the upper end of the shank isplaced against the breast and the operating-crank used in the usualmanner vin breast-drills.

The supporting-frame is preferably made of wrought-iron tubing, whilethe supportingrods and the interior adjusting screw-spindle are made ofsolid steel. The parts of the support can be readily assembled ordetached and the drill easily removed therefrom when it is desired touse it as a breast-drill.

My improved drill is capable of large application for outdoor and indoorwork, as the support can be clamped to any size of work and holes bebored at any relative distance and position to the support by the drill.

Having thus described my invention, I claim as new and desire to secureby Letters Patent* l. A support for hand-drills, consisting of a tubularmain pillar, a sleeve adjustable on said pillar, an interiorextension-tube in said pillar, means for adjusting said extension tube,clamping-jaws at one end of the main pillar and extension-tube, meansfor clamping the exterior sleeve to the main pillar, a shoulder and acollar provided each with a socket sidewise of and at right angles tothe shoulder and collar respectively, drill-supporting rods guided insaid sockets, and means for clamping said supporting-rods to saidsockets, substantially as set forth.

2. A support for hand-drills, consisting of a tubular main pillarprovided with a clampingjaw at one end, an interior extension-tube alsoprovided with a clamping-jaw adjacent to the clamping-jaw of the mainpillar, means for adjusting said extension-tube in the pillar forsetting the jaws at a suitable distance from each other, an exteriorsleeve on the pillar, means for clamping said sleeve tothe pillar, ashoulder on the sleeve provided with a socket, an adjustable collar onsaid exterior sleeve provided with a socket, supporting-rods for thedrill, and clamping devices for clamping the supporting-rods wheninserted into the sockets, substantially as set forth.

3. The combination of a tubular main pillar provided with a jaw at itslower end, an extension-tube in said main pillar also provided with aclamping-jaw at the end adjacent to the jaw IOO ISO

of the pillar, means for adjusting the exteni end of the lowersupporting-rod, and a clasp -on the upper rod provid ed With ascrew-thread atits interior adapted to engage the threaded shank of thehand-drill, substantially as set 15 forth.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

FRANK P. sHEK.

Witnesses:

PAUL GonPEL, HENRY J. SUHRBIER.

